SOUND-PROOFING GUARD Russian patent published in 2007 - IPC F16P1/02 E01F8/00 

FIELD: safety devices for reduction of noise level of machines and equipment.

SUBSTANCE: proposed sound-proofing guard includes casing mounted on vibration-insulating support which is made in form of box-shaped framework with sound-absorbing material laid between its walls. Box-shaped framework may be either solid or built-up of noise-absorbing components inscribed in its contour. Noise-absorbing components consist of front wall with slotted perforations and rear wall. Walls are made from stainless steel or zinc-plated sheet, 0.7 mm thick with polymer protective decorative coat, type PURAL, 50 mcm thick or POLYESTER, 25 mcm thick; it may be also made from aluminum sheets, 1.0 mm thick provided with coat, 25 mcm thick. Ratio of framework height h to its width b is optimal: h/b=1.0-2.0 and ratio of thickness s' of assembled framework to its width is optimal: s'/b=0.1-0.15; ratio of thickness s of sound-absorbing material to thickness s' of assembled framework is optimal: s/s'=0.4-1.0; coefficient of perforation of front wall is equal to or more than 0.25.

EFFECT: enhanced efficiency of noise suppression.

7 cl, 5 dwg